Table 2.

Sixty six nasopharyngeal swabs were tested by RT-PCR using single- (NIID) and double-quencher (YCH) probes.

Sample No.	NIID-N1 (single- quencher)	YCH-N1 (double-quencher)	NIID-N2 (single- quencher)	YCH-N2 (double-quencher)	RPP30
#1	+	+	+	+	+
#2	+	+	+	+	+
#3	+	+	+	+	+
#4	+	+	+	+	+
#5	+	+	+	+	+
#6	+	+	+	+	+
#7	+	+	+	+	+
#8	+	+	+	+	+
#9	+	+	+	+	+
#10	+	+	+	+	+
#11	ND	+	+	+	+
#12	ND	ND	+	+	+
#13	ND	ND	+	+	+
#14	ND	ND	+	+	+
#15	ND	ND	+	+	+
#16	ND	ND	+	+	+
#17	ND	ND	+	+	+
#18	ND	ND	ND	+	+
#19–66	ND	ND	ND	ND	+

+, detected; ND, not detected; NIID, National Institute of Infectious Diseases; YCH, Yamanashi Central Hospital; RPP30, ribonuclease P 30 subunit.